Grass Seed Germination Temperature Chart. The first chart gives the minimum and maximum temperatures at which seeds will germinate. This is usually from March through until September.
This will help prevent condensation from forming on the seeds and inside the container. On average the UK usually has sufficient rainfall in March April and September October. 14 to 30 days.
8 rows The best soil temperature for grass seed germination is above 65ºf and this temperature.
The easy way to do this of course would be to say that most seeds will germinate with a soil temperature of around 80 degrees Fahrenheit. Genus Temperature Time to germinate Notes 4 Asclepias 16ºC18ºC 61ºF64ºF 3090 days Cold stratify for 3 weeks. Keep soil temperature consistent at 21 to 29C with some dayvariation in this range. Ideally you need two weeks of continuous daily.